I would suggest you to buy a Samsung Galaxy Pro because it has good features,applications,3G and good phone for web browsing.
You can buy a locked Samsung Galaxy Pro Mobile Phone it is very low cost when compared to an unlocked phone.After buying the phone visit the site http://www.unlocking4u.com/samsung-galaxy-pro/rs16wp9/ here they are providing unlock code at low cost.Using that code you can unlock your phone easily.After unlocking it,you can use freely any GSM network SIM card.This is the easy,safe,fast and permanent unlocking method.